Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| 1 |
Goldman Sachs
GS
|
+$38.4M |
| 2 |
Micron Technology
MU
|
+$23.7M |
| 3 |
NVIDIA
NVDA
|
+$23.6M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$21.7M |
| 5 |
Wells Fargo
WFC
|
+$20.4M |
Top Sells
| 1 |
Citigroup
C
|
+$21.6M |
| 2 |
Apple
AAPL
|
+$17.2M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$13.3M |
| 4 |
Eli Lilly
LLY
|
+$9.69M |
| 5 |
Mastercard
MA
|
+$8.27M |
Sector Composition
| 1 | Technology | 14.2% |
| 2 | Communication Services | 13.46% |
| 3 | Consumer Discretionary | 12.76% |
| 4 | Healthcare | 12.43% |
| 5 | Financials | 10.75% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
IBKC
276
DELISTED
IBERIABANK Corp
IBKC
| $939K | 0.04% |
+11,879
| New | +$939K |
|
|
CEO
277
DELISTED
CNOOC Limited
CEO
| $935K | 0.04% |
7,812
+5,495
| +237% | +$658K |
|
278
Deckers Outdoor
DECK
$17.1B
| $925K | 0.04% |
92,940
+57,522
| +162% | +$572K |
|
279
Icon
ICLR
$14B
| $923K | 0.04% |
11,587
+10,804
| +1,380% | +$861K |
|
280
Thomson Reuters
TRI
$72.4B
| $923K | 0.04% |
+18,690
| New | +$923K |
|
281
SPDR S&P Biotech ETF
XBI
$5.62B
| $922K | 0.04% |
13,297
+13,047
| +5,219% | +$905K |
|
282
LKQ Corp
LKQ
$8.01B
| $919K | 0.04% |
31,431
+9,488
| +43% | +$277K |
|
283
Tenet Healthcare
THC
$16.8B
| $909K | 0.04% |
51,348
+19,645
| +62% | +$348K |
|
|
MLNX
284
DELISTED
Mellanox Technologies, Ltd.
MLNX
| $901K | 0.04% |
17,685
+12,247
| +225% | +$624K |
|
285
Eversource Energy
ES
$23.7B
| $899K | 0.04% |
+15,303
| New | +$899K |
|
286
Synaptics
SYNA
$2.87B
| $896K | 0.04% |
18,099
-21,411
| -54% | -$1.06M |
|
287
Weyerhaeuser
WY
$17.7B
| $889K | 0.04% |
26,181
+10,381
| +66% | +$352K |
|
|
ILG
288
DELISTED
ILG, Inc Common Stock
ILG
| $882K | 0.04% |
42,096
+40,596
| +2,706% | +$851K |
|
|
SHPG
289
DELISTED
Shire pic
SHPG
| $873K | 0.04% |
+5,016
| New | +$873K |
|
290
Charles Schwab
SCHW
$169B
| $872K | 0.04% |
+21,387
| New | +$872K |
|
291
Genesis Energy
GEL
$2.06B
| $871K | 0.04% |
26,873
+23,560
| +711% | +$764K |
|
|
GIMO
292
DELISTED
Gigamon Inc.
GIMO
| $866K | 0.04% |
+24,379
| New | +$866K |
|
|
WMGI
293
DELISTED
Wright Medical Group Inc
WMGI
| $863K | 0.04% |
27,750
+20,034
| +260% | +$623K |
|
294
Nelnet
NNI
$4.64B
| $860K | 0.04% |
19,626
+12,941
| +194% | +$567K |
|
295
Supernus Pharmaceuticals
SUPN
$2.59B
| $859K | 0.04% |
+27,447
| New | +$859K |
|
296
United States Oil Fund
USO
$980M
| $857K | 0.04% |
+10,077
| New | +$857K |
|
297
Ameren
AEE
$26.7B
| $854K | 0.04% |
15,652
+10,251
| +190% | +$559K |
|
|
ZAYO
298
DELISTED
Zayo Group Holdings, Inc.
ZAYO
| $854K | 0.04% |
25,958
+6,207
| +31% | +$204K |
|
|
ABB
299
DELISTED
ABB Ltd.
ABB
| $847K | 0.04% |
+36,216
| New | +$847K |
|
300
Element Solutions
ESI
$6.52B
| $844K | 0.04% |
+64,845
| New | +$844K |
|